3911216 has 10 divisors (see below), whose sum is σ = 7578012. Its totient is φ = 1955600.

The previous prime is 3911203. The next prime is 3911221. The reversal of 3911216 is 6121193.

It is a happy number.

It is a super-2 number, since 2×3911216² = 30595221197312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3911191 and 3911200.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122210 + ... + 122241.

Almost surely, 2^3911216 is an apocalyptic number.

It is an amenable number.

3911216 is a deficient number, since it is larger than the sum of its proper divisors (3666796).

3911216 is a wasteful number, since it uses less digits than its factorization.

3911216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244459 (or 244453 counting only the distinct ones).

The product of its digits is 324, while the sum is 23.

The square root of 3911216 is about 1977.6794482423. The cubic root of 3911216 is about 157.5568418332.

Subtracting from 3911216 its sum of digits (23), we obtain a palindrome (3911193).

The spelling of 3911216 in words is "three million, nine hundred eleven thousand, two hundred sixteen".